I understand that it would be nice eventually to have images saved like that 
automatically.

It is still a pity that the VM has to change for that ;-)

But as far as I understood, the first 512 bytes are skipped today as well, 
so if you (or any program) does a binary edit of the image header, it would 
work, no ?

On 16 Oct 2012, at 14:58, Camillo Bruni <[email protected]> wrote:

> 
> On 2012-10-16, at 14:49, Damien Cassou <[email protected]> wrote:
> 
>> On Sat, Oct 13, 2012 at 10:51 PM, Camillo Bruni <[email protected]> 
>> wrote:
>>>> It is supported, see for instance: 
>>>> http://marc.info/?l=squeak-vm-dev&m=124049248310307&w=2
>>> awesome! strange that nobody promoted that so far...
>>> well I guess yet another of these hidden treasures ;)
>> 
>> so, how can we have all images start with that line?
> 
> 
> we have to change the VM, yay! :/, to add a language side-hook:
> 
> https://code.google.com/p/cog/issues/detail?id=101
> 
> so once I have a bit of time, I'll change the VM to always include this 
> header.
> Load support for such images exist since the early days apparently.
> 
> I will simply add a #header argument to the #snapshot method, that way the
> image can pass an arbitrary header to the VM on image save.
> 
> best
> cami


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